/**
 * $RCSfile$
 * $Revision$
 * $Date$
 *
 * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jivesoftware.smack.proxy;

import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.Socket;
import java.net.UnknownHostException;

import javax.net.SocketFactory;

/**
 * SocketFactory for direct connection
 * 
 * @author Atul Aggarwal
 */
class DirectSocketFactory 
    extends SocketFactory
{

    public DirectSocketFactory()
    {
    }

    static private int roundrobin = 0;

    public Socket createSocket(String host, int port)
        throws IOException, UnknownHostException
    {
        Socket newSocket = new Socket(Proxy.NO_PROXY);
        InetAddress resolved[] = InetAddress.getAllByName(host);
        newSocket.connect(new InetSocketAddress(resolved[(roundrobin++) % resolved.length],port));
        //设置超时时间，如果不设置那么如果连接不上服务器 Android会在3分钟后才能抛出socket连接错误，因此设置socket超时时间
        //newSocket.connect(new InetSocketAddress(resolved[(roundrobin++) % resolved.length],port),10*1000);
        return newSocket;
    }

    public Socket createSocket(String host , int port, InetAddress localHost,
                               int localPort)
        throws IOException, UnknownHostException
    {
        return new Socket(host,port,localHost,localPort);
    }

    public Socket createSocket(InetAddress host, int port)
        throws IOException
    {
        Socket newSocket = new Socket(Proxy.NO_PROXY);
        newSocket.connect(new InetSocketAddress(host,port));
        return newSocket;
    }

    public Socket createSocket(InetAddress address, int port,
                               InetAddress localAddress, int localPort)
        throws IOException
    {
        return new Socket(address,port,localAddress,localPort);
    }

}
